Picture offshore wind farm

Open Access: World leading research into plasma physics...

Strathprints makes available scholarly Open Access content by researchers in the Department of Physics, including those researching plasma physics.

Plasma physics explores the '4th' state of matter known as 'plasma'. Profound new insights are being made by Strathclyde researchers in their attempts to better understand plasma, its behaviour and applications. Areas of focus include plasma wave propagation, non-linear wave interactions in the ionosphere, magnetospheric cyclotron instabilities, the parametric instabilities in plasmas, and much more.

Based on the REF 2014 GPA Scores, Times Higher Education ranked Strathclyde as number one in the UK for physics research.

Explore Open Access plasma physics research and of the Department of Physics more generally. Or explore all of Strathclyde's Open Access research...

Modelling the aerodynamics of vertical-axis wind turbines in unsteady wind conditions

Scheurich, Frank and Brown, Richard (2013) Modelling the aerodynamics of vertical-axis wind turbines in unsteady wind conditions. Wind Energy, 16 (2). pp. 91-107. ISSN 1095-4244

[img] PDF
Brown_RE_Modelling_the_aerodynamics_of_vertical_axis_wind_turbines_in_unsteady_wind_conditions_24_Feb_2013.pdf
Final Published Version

Download (2MB)
[img] PDF
Brown_RE_Pure_Modelling_the_aerodynamics_of_vertical_axis_wind_turbines_in_unsteady_wind_conditions_24_Feb_2013.pdf
Preprint

Download (5MB)

Abstract

Most numerical and experimental studies of the performance of vertical-axis wind turbines have been conducted with the rotors in steady, and thus somewhat artificial, wind conditions - with the result that turbine aerodynamics, under varying wind conditions, are still poorly understood. The Vorticity Transport Model has been used to investigate the aerodynamic performance and wake dynamics, both in steady and unsteady wind conditions, of three different vertical-axis wind turbines: one with a straight-bladed configuration, another with a curved-bladed configuration and another with a helically twisted configuration. The turbines with non-twisted blades are shown to be somewhat less efficient than the turbine with helically twisted blades when the rotors are operated at constant rotational speed in unsteady wind conditions. In steady wind conditions, the power coefficients that are produced by both the straight- and the curved-bladed turbines vary considerably within one rotor revolution because of the continuously varying angle of attack on the blades and, thus, the inherent unsteadiness in the blade aerodynamic loading. These variations are much larger, and thus far more significant, than those that are induced by the unsteadiness in the wind conditions.